The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Voigtlander 75mm f1.5 VM and the Voigtlander 40mm F1.4 Nokton Classic for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Voigtlander 75mm f1.5 VM is the longer of the two lenses at 63mm. The Voigtlander 40mm F1.4 Nokton Classic with a length of 30mm, is 33mm shorter. Besides being longer, the Voigtlander 75mm f1.5 VM also has a larger diameter of 63mm compared to the Voigtlander 40mm F1.4 Nokton Classic's 55mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Voigtlander 40mm F1.4 Nokton Classic weighs 175g, 50% (175g) lighter than the Voigtlander 75mm f1.5 VM's weight of 350g.
Lens Mounts
Both the Voigtlander 75mm f1.5 VM and the Voigtlander 40mm F1.4 Nokton Classic has the same Leica M lens mount. Some of the latest released cameras that are compatible with the Leica M lenses are Pixii+, Epson R-D1x and Epson R-D1.
Focal Range
Voigtlander 75mm f1.5 VM is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of
112.5mm when used on a 35mm FF format camera.
On the other hand, the Voigtlander 40mm F1.4 Nokton Classic is a prime lens with fixed focal lenght of 40mm.